Changes after anesthesia is administered are related to the type of anesthesia, and there may be situations such as being conscious or losing consciousness. 1. General anesthesia: after the anesthesia drug enters the body, the central nervous system is suppressed, and the patient goes from awake to unconsciousness, and meets the state of surgery from the disappearance of pain. In addition, due to the use of muscle relaxants, patients are in the stage of apnea after anesthesia and need to rely on ventilators to maintain breathing. 2. Intravertebral anesthesia: local anesthetics are injected into the subarachnoid space or epidural, after anesthesia, the patient is still preserved in the awake state, and can breathe on his/her own, and there is no sensation in the limbs only below the plane of anesthesia, but this situation can be recovered slowly after the operation. 3. Nerve block: local anesthetic will be injected into the trunk or limbs of the nerve trunk, plexus, etc., and block the conduction function of the corresponding nerves, so that the innervated area produces anesthesia, for example: brachial plexus nerve block in the upper limb, only the affected limb produces no pain sensation, while the rest of the limb does not produce anesthesia, and the whole process is still awake. Anesthesia needs to be selected according to the patient’s general condition and surgical method, and the final reaction after the anesthesia is also related to the mechanism of action of various anesthesia methods. Consult your physician for advice.